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210 Model.) a Sheets-Sheet 1. P. BENTZEN & G. P. OLSEN.

BOILER. No. 541,830. Patented July 2, 1895.

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BOILER.

No. 541,830. Patented July 2, 1895.

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BOILER. No. 541,830. Patented July 2, 1895.

WITNESSES: GM INVENTQRS M L Mi flW men Y5 Urrrrnn fi rn'rns arnryrGrater.

PETER BENTZEN, OF NEWPORT, AND CHRISTIAN F. OLSEN, OF BRISTOL, RHODEISLAND.

BOILER.

SPECIFICATION forming part of Letters Patent No. 541,830, dated J'tily2, 1895.

Application filed February 4, 1895. Serial No. 537,177. (No model.)

To all whom it may concern.-

Be it known that we, PETER BENTZEN, residing atNewport, in the county ofNewport, and

CHRISTIAN F. OLSEN, residing at Bristol, in the county of Bristol, Stateof Rhode Island, subjects of the King of Denmark, have invented certainnew and useful Improvements in Boilers, of which the following is afull, clear, and exact specification.

The objects of our invention are, first, to construct a-tuloulous boilerwhich ,shall'pro vide for an enlarged grate and combustion area; second,to provide series of manifolds connected with a plurality of watervessels and generator tubes; third, to construct a de tachable,sectional casing to inclose said boiler, and, fourth, to make the saidboiler in such ainanner that the greatest amount of efficiency shall beobtained, without sacrificint, simplicity of construction, or econoinyincost. With these objects in view, reference is had to the annexedspecification and drawings, in which Figure 1 is a side elevation of thecomplete boiler, with a portion of the casing broken away. Fig. 2 is afront elevational view of the complete boiler of Fig. 1, with one-halfof the front casing broken away. Fig. 3 is an end elevation of a seriesof manifolds attached to a water vessel. Fig. 4 is a side elevation of aportion of one row of said manifolds. Fig. 5 is an enlarged sideelevational, broken view of a single manifold with its generator pipesmostly broken away. Fig. 6 is aside, broken view, of an improved gratebar; and Fig. 7 is a cross-sectional view of Fig. 6.

A, A represent two horizontally disposed water vessels, a given distanceabove and between which is located a steam receptacle B,

to, the outer casing I.

These manifolds E are constructed preferably as shown in Fig. 5, and insuch construction consist essentially of a casting having an opening erunning therethrough, with a pinrality of lateral projections e andopenings formed therein, communicating with the said main opening 6; thegenerator tubes G being connected with said projections. A pro jectingportion or pipe F continues from the lower part of said manifold, and isjoined, by

means of a union nutfto projections f cor; responding in number to thenumber of manifolds and arranged along the top of each of j the saidwater vessels. The said projections are preferably threaded, andarranged in alternate rows, if desired (having openings communicatingwith the interior of their said respective water chambers), and theunion nut, fitting with its flange over a flange on the pipe F isadapted to be screwed tightly down upon the said projection f to connectthe manifolds therewith. Piugs e are screwed into holes, which admit ofaccess to the end of each generator tube, opposite the openings in theprojections e. The said manifolds may also be arranged at different andalternate heights as shown in Figs. 1 and 2. It will be noticed 'in thelatter view that the lowest in position of the generator tubes, are asufficient distance above the grate D to allow of a very large fire box;in fact, larger than the fire box in similar tubulous boilers.

The tubes G are preferably formed straight from the manifolds andareinclined upwardly, as shown, toward the centerof the fire chamher,where they are bent, approximately, as at g, g, and g and are thenconnected with the separator, in the upper portion thereof, in the usualmanner.

From the top of each manifold extends upwardly a generator tube H, whichcompose a wall of generator tubes, whichare preferably conformed to theshape of, and are adjacent This wall of generator tubes utilizes suchheat as would otherwise come in contact with the said casing and becooled or lost for generating purposes. It

will be noticed furthermore that the shape given to the generator tubesG forms the combustion chambers J. J, which utilize, by reaon of bettercombustion, gases which would otherwise be of little use, or would passoff inelfectnally through the stack.

At each end of the entire series of generator tubes is arranged amanifold, considerably above the general level of the other manifolds,and from each of these manifolds continues a set of generator tubes K,which tubes are located adjacent to the front and rear walls of thecasing I, and are shorter in length and differently bent than the otherset of tubes. This construction prevents the waste of gases at the endsof the said casings; so that the full combustion taking place within thecasing is utilized, and, by providing the combustion chambers, suchcombustion is enlarged and facilitated, while the gases will enter theuptake and stack at a comparatively low temperature Located within thesteam receptacle B is a separator plate L which is preferably corrugatedlaterally, as shown in our former appli' cation, and extendsapproximately thelength of the said receptacle, to intercept the flow ofsteam from the generator tubes. Return pipes M M connect the lowerpartof the separator B with the two water vessels A. A, to allow a readyreturn of condensed, and flow of feed water, to the said vessel.

A feed water heater is represented by a number of lengths of pipe N,which, leading from an i'njector or pump enter the casing I, at N andare located within one of the combustion chambers J, and passing underthe receptacle B, as at 'n, continue their folds, as at N,in theopposite combustion chamberJ, (not shown) where the said heaterisconnected as at j to the said receptacle B. A feed water valve, to apipe leading from a donkey pump, is indicated at J.

A steam feed pipe 0 is horizontally arranged within the receptacle B,and under the separator plate L, and passes out through the saidreceptacle B, at P, outside of the front casing I, the ends of whichreceptacle project through the said casing; the ends of the water vesselalso passing outside of the said casing where the return pipes M, M,connect the said receptacle and water vessels together. Fire bricks Qare disposed along each side of the fire box and against the inwardsurface of the water vessels, to protect them; also at each end ofeasing.

The casing, I is formed and put on in sections, similar to the onesmarked R, S, T, U, and any section thereof can be removed independently.The said sections as, shown are retained in place by the cleats orstraps r, s, t, u, t), or by any other suitable means, and are intendedto be removed through the' coal bunkers, or the deck, as foundconvenient and according to the location of the boiler.

The ordinary self-closing doors are provided for the ash pit, and thesaid ash pit is of commonconstruction. ThegratebarsVt arehowever formedtriangular in cross section, as

shown in Figs. 6 and 7, and have each a collar to shrunk on, near theirforward ends. Holes 00 are formed in the front of the casing as shown.Transverse grate bar supporters y suppport the said grate bar to, andthe said collars to, being, when the said bars to are in place, locatedwithin the holes X of the said front plate, while the forward ends ofthe said bars protrude beyond the said collar to, and serve as aneffectual means to prevent escape of steam in case of leakage, or ofgases, into the stoke hole, from within the casing I.

A baffle plate Z is provided under the separator to prevent by reason ofits glancing the heat from, and shielding the separator, excessiveebullition or rising of the water therein.

In the event of one or more tubes being defective or showing leakage.the said condition can be readily corrected by fixing a plate in theunion nut to cutoff steam from the lower part of a manifold, and byplugging the opening of said defective tube at its entrance in thereceptacle.

The construction herein set forth provides for readily removing orrepairing any setof generator tubes or part of the generator; and theextremely large grate area provided in this boiler renders it suitablefor burning either hard or soft coal, and it is thus capable ofaccomplishing great results without forced draft.

Having now fully described our invention, what we claim, and desire tosecure by Letters Patent, is

1. A steam generator having a plurality of water vessels and a steamreceptacle, a'plurality of bent generator tubes connected in two series,at one end with said steam receptacle, and each series connected attheir other ends with a manifold, and a connection formed between eachof said manifolds and said water vessels, said manifolds having directconnection only with said generator tubes, substantially as set forth.

2. A steam generator having a plurality of water vessels, a steamreceptacle, generator tubes connected with said receptacle, rows ofmanifolds connected detachably with each of said water vessels, the saidwater vessels being independent of each other, and a connection formedbetween said tubes and said water vessels, the said manifolds connectingdirectly only with said generator tubes and with their respective watervessels,substantially as set forth.

3. A steam generator having a plurality of water vessels, and a steamreceptacle, bent generator tubes, secured in series to said receptacle,and manifolds connected with, and projecting upwardly from, the upperpart of each of said water vessels, said manifolds having directconnections each only with a series of said generator tubes and withtheir said respective water vessels, substantially as set forth.

4. A steam generator having a plurality of IIO Water vessels, and asteam receptacle, generator tubes connected with said receptacle,manifolds connected with each of said water vessels, and arranged inalternate rows upon same, and connection formed between said tubes andsaid manifolds, substantially as set forth.

5. A steam generator having a plurality of elongated Water vessels, andasteam receptacle,'the latter located above and between the former,generator tubes connected with the steam receptacle and passing in apartially curved form to, and connected with, the said Water vessels,water heater pipes connected, and located adjacent to the said steamreceptacle and within arches or concavities formed by the said generatortubes, the said pipes connecting with a feed valve and with the saidsteam receptacle, and adapted to connect with an injector, substantiallyas set forth.

6. A steam generator having a plurality of elongated 'water vessels anda steam receptacle, the latter located above and between the former,generator tubes connected with the steam receptacle and passing in apartially curved form to, and connected with, the said water vesselsparallel water heater pipes connected with bended ends and locatedadjacent tothe said steam receptacle, on opposite sides thereof, andWithin arches or concavities formed by the said generator tubes, thesaid heater pipes connecting with a feed valve and with the said steamreceptacle, and adapted to connect with an injector, substantially asset forth.

7. A steam generator having two Water vessels, the said water vesselsbeing arranged each at approximately opposite "sides of the saidgenerator, rows of manifolds arranged along, and supported by, saidwater vessels, generator tubes connected in series with said manifoldsand with a steam receptacle, one

of the said manifolds, at each end of the aforesaid rows of manifolds,being raised above the other of said manifolds, the said generator tubesof the said outer manifolds being shorter and running through adifferent area than the generator tubes of the othermanifolds,-substantially as set forth.

8. In a steam generator having a Water vessel, a steam receptacle, andgenerator tubes connecting the said parts, a removable fireproof casingeffectually inclosing said generator, and means, consisting of elongatedpieces, for overlapping the seams of, and for retaining in place thesections of said casings, substantially as set forth.

In testimony that We claim the foregoing We have hereunto set our handsthis 19th day of January, 1895.

PETER BENTZEN. CHRISTIAN F. OLSEN. Witnesses:

TH. SEH. POEKEL, O. S. POEKEL.

